Boiler Replacement vs Repair — Cost Comparison

Boiler Repair vs Replacement: The Cost Comparison

Deciding whether to repair or replace your boiler depends on its age, repair history, and the cost of the fix needed.

The 50% Rule

If the repair cost is more than 50% of what a new boiler would cost, replacement is almost always better value.

Age Factor

• Under 5 years: repair (probably under warranty)
• 5–10 years: depends on repair cost
• Over 10–12 years: replace — efficiency savings will offset the cost within 2–4 years

Efficiency Savings

A new A-rated boiler can save £150–£350 per year compared to an old G-rated model. Over 10 years, that's up to £3,500 in savings.